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A method for dechlorination and decarburization of titanium tailings

A technology for extracting titanium tailings and dechlorination, applied in cement production, etc., to achieve the effects of reducing energy consumption, good economic and social benefits, and simple process

Active Publication Date: 2021-11-09
攀钢冶金材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for dechlorination and decarburization of titanium tailings. The titanium tailings treated by the method provided by the invention can be used as cement and concrete admixtures, thereby successfully solving the problem of Secondary utilization and discharge of titanium tailings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] After mixing the titanium extraction tailings with 50% coal gangue powder by the mass of the titanium extraction tailings, granulate with a disc to obtain granules with a particle size of 5-15 mm;

[0048] The granules are roasted in a shaft kiln, the roasting temperature is controlled at 900-1000° C., and the roasting time is 3 hours to obtain the treated titanium extraction tailings.

[0049] According to GB / T16555-2017 "Chemical Analysis Method for Refractories Containing Carbon, Silicon Carbide and Nitride", the mass content of Cl- in the treated titanium extraction tailings is 0.05-0.06%, and the mass content of carbon is 0.3-0.5%. .

[0050] According to the standard of JC / T486-2015 "Composite Admixture for Concrete", the activity index of the treated titanium extraction tailings obtained in Example 1 of the present invention after 28 days is 75%.

Embodiment 2

[0052] After mixing the titanium extraction tailings with 30% coal gangue powder by mass of the titanium extraction tailings, adopt disc granulation to obtain granules with a particle size of 5-15 mm;

[0053] The granules are roasted in a shaft kiln, the roasting temperature is controlled at 900-1100° C., and the roasting time is 2.5 hours to obtain the treated titanium extraction tailings.

[0054] The measurement is carried out according to the method of Example 1, and the Cl- mass content in the treated titanium extraction tailings is 0.04-0.06%, and the carbon mass content is 0.2-0.4%.

[0055] According to the method described in Example 1, the activity index of the treated titanium extraction tailings obtained in Example 2 of the present invention for 28 days was 74%.

Embodiment 3

[0057] After mixing the titanium extraction tailings with 10% coal gangue powder by mass of the titanium extraction tailings, granulate with a disc to obtain granules with a particle size of 5-15 mm;

[0058] The granules are roasted in a shaft kiln, the roasting temperature is controlled at 950-1150° C., and the roasting time is 2 hours to obtain the treated titanium extraction tailings.

[0059] The measurement is carried out according to the method of Example 1, and the Cl- mass content in the treated titanium extraction tailings is 0.04-0.06%, and the carbon mass content is 0.1-0.3%.

[0060] According to the method described in Example 1, the activity index of the treated titanium extraction tailings obtained in Example 3 of the present invention for 28 days was 73%.

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Abstract

The invention provides a dechlorination and decarburization method for titanium extraction tailings, comprising: mixing the titanium extraction tailings and carbonaceous materials and then granulating to obtain pellets; roasting the pellets to remove the titanium extraction Carbon and chlorine in tailings. The method provided by the invention has the advantages of simple process, high output and low cost. It can also make full use of the carbon in carbonaceous materials (such as coal gangue) to reduce energy consumption. The pozzolanic effect and its gelling activity can improve the gelling activity of the titanium tailings after roasting, which is more conducive to the application as a cement or concrete admixture.

Description

technical field [0001] The invention relates to the technical field of extracting titanium tailings, in particular to a dechlorination and decarburization method for extracting titanium tailings. Background technique [0002] The blast furnace slag of Panzhihua Iron and Steel Co., Ltd. extracts TiO, a useful component in the slag, through high-temperature carbonization and low-temperature chlorination. 2 Finally, a large amount of tailings are produced, and the solid waste contains 2 to 4% Cl - and 6-10% carbon residue, if the tailings are not treated, they can neither be used in other industries nor directly discharged, which will inevitably have a great impact on the environment. [0003] How to treat the tailings from titanium extraction has become an urgent problem to be solved by those skilled in the art. Contents of the invention [0004] In view of this, the purpose of the present invention is to provide a method for dechlorination and decarburization of titanium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B5/00C04B7/147
CPCC04B5/00C04B7/147Y02P40/10
Inventor 万红伶童武兵李国栋丁见鹏杨强段大福王怀斌李师程孙晓婷李冬梅杨浩李娇林江华
Owner 攀钢冶金材料有限责任公司